title: Trends in use of electronic nicotine delivery systems by adolescents.
abstract: Electronic nicotine delivery systems (ENDS) have been gaining in popularity. The few prevalence studies in adults have found that most ENDS users are current or former smokers. The objectives of this study were to estimate the prevalence of ENDS usage in adolescents, and examine the correlates of use. Self-administered written surveys assessing tobacco use behaviors were conducted in multiple waves as part of a larger intervention study in two large suburban high schools. The prevalence of past-30 day ENDS use increased from 0.9% in February 2010 to 2.3% in June 2011 (p=0.009). Current cigarette smokers had increased odds of past-30 day ENDS use in all study waves. When adjusted for school, grade, sex, race and smoking status, students in October 2010 (Adjusted OR 2.12; 95% confidence interval (CI): 1.12-4.02) and June 2011 (Adjusted OR 2.51; 95% CI: 1.17-4.71) had increased odds past-30 day ENDS use compared to February 2010. The prevalence of ENDS use doubled in this sample of high school students, and current cigarette smoking is the strongest predictor of current use. Continued monitoring of ENDS is needed to determine whether it increases the likelihood of cigarette smoking initiation and maintenance in youth.
authors.affiliation: Department of Pediatrics, Yale University School of Medicine, PO Box 208046, New Haven, CT 06520, USA. Electronic address: deepa.camenga@yale.edu.
authors.forename: Deepa R
authors.initials: DR
authors.lastname: Camenga
authors.forename: Jennifer
authors.initials: J
authors.lastname: Delmerico
authors.forename: Grace
authors.initials: G
authors.lastname: Kong
authors.forename: Dana
authors.initials: D
authors.lastname: Cavallo
authors.forename: Andrew
authors.initials: A
authors.lastname: Hyland
authors.forename: K Michael
authors.initials: KM
authors.lastname: Cummings
authors.forename: Suchitra
authors.initials: S
authors.lastname: Krishnan-Sarin
mesh_terms: D000293:Adolescent; D000294:Adolescent Behavior; D016503:Drug Delivery Systems / Q000706:statistics & numerical data* / Q000639:trends; D005260:Female; D006801:Humans; D016015:Logistic Models; D008297:Male; D009538:Nicotine / Q000008:administration & dosage*; D018722:Nicotinic Agonists / Q000008:administration & dosage*; D015995:Prevalence; D012907:Smoking / Q000453:epidemiology*; D061485:Tobacco Use Cessation Devices / Q000706:statistics & numerical data* / Q000639:trends; D014481:United States / Q000453:epidemiology
chemical_list: D018722:Nicotinic Agonists; D009538:Nicotine
keywords: Adolescent; Epidemiology; Tobacco